Rate Of Reactions_ Endo & Exo_acids And Bases

35
Questions IBy Kristi.taylor

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This is a quiz created for 8th grade physical science students. This is the last bit of chemistry that is covered in our al course of study before moving into our physics sections. This covers rates of chemical reactions, endothermic and exothermic reactions and acids and bases.

Reveal Answers:During the Quiz (Practice Mode) End of Quiz (Exam Mode)Number of questions:

If a solution has a pH above 7 then you know that the solution is a/an ____________.

2.

What kind of reaction is sugar and sulfuric acid (H2SO4)?

A.

Endothermic

B.

Exothermic

3.

Is soap an acid, base or neutral solution?

A.

Acid

B.

Base

C.

Neutral

4.

What is the pH of a neutral solution?

A.

0

B.

1

C.

7

D.

14

5.

What is the movement of water from an area of low solute concentration to an area of high solute concentration?

A.

Osmosis

B.

Neutralization

C.

Diffusion

D.

Concentration

6.

What is it called when acids and bases destroy each other's chemical properties?

A.

Osmosis

B.

Neutralization

C.

Diffusion

D.

Concentration

7.

Which kinds of reactions absorb energy?

A.

Endothermic Reactions

B.

Exothermic Reactions

8.

In a chemical reaction, adding a catalyst will

A.

Slow the reaction down.

B.

Have very little affect.

C.

Cause neutralization.

D.

Speed the reaction up.

9.

Which of the following is not a characteristic of acids?

A.

Turn litmus paper red

B.

Feel slippery to the touch

C.

Are found in many juices

D.

React with most metals

10.

What kind of reaction is a blow torch?

A.

Endothermic

B.

Exothermic

11.

The numbers on the pH scale usually go from zero to ___________.

12.

Which kind of reaction is photosynthesis?

A.

Endothermic

B.

Exothermic

13.

Breaking a solid reactant into smaller pieces will

A.

Decrease the temperature of a solution.

B.

Increase the rate of the chemical reaction.

C.

Slows the chemical reaction rate.

D.

None of the above.

14.

_______________ is needed to break bonds and _______________ is released when new bonds are formed. (same word for both blanks)

15.

When the reactants have more energy than is needed what happens to this extra energy?

A.

It is burned up

B.

It is released.

C.

It is absorbed

D.

It disappears.

16.

What would be a reasonable pH for a base that is not very strong and not very weak?

A.

1

B.

14

C.

8

D.

11

E.

13

17.

If a solution has a pH below 7 then you know that solution is a/an __________.

18.

Why does putting a light stick in the freezer make it last longer?

A.

The particles speed up so the reaction is happening faster.

B.

It absorbs the light when it is cold and releases it when it is warmed back up.

C.

The particles slow down so the reaction is only barely still happening.

D.

The particles stop moving entirely and the reaction also stops completely.

19.

What kind of a reaction is a firefly's glow?

A.

Endothermic

B.

Exothermic

20.

What kind of a reaction is ice cream melting?

A.

Endothermic

B.

Exothermic

21.

What kind of reaction releases energy?

A.

Decomposition reaction

B.

Single replacement reaction

C.

Exothermic reaction

D.

Endothermic reaction

22.

Bonus #1
Suppose you have 1L of and acid solution with a pH of 2. You add 1L of pure water. The pH will go _______.

23.

A solution's ___________________________ depends on the number of particles that are present in a certain volume.

24.

If a solution has a lot of H+ (Hydrogen ions), will it be an acid, base or neutral?

A.

Acid

B.

Base

C.

Neutral

25.

Is orange juice an acid, base or neutral solution?

A.

Acid

B.

Base

C.

Neutral

26.

What are the 4 things that can affect the rate of a reaction?

A.

Concentration, surface area, temperature & conductivity

B.

Surface area, catalyst, temperature, and precipitation

C.

Concentration, temperature, surface area, catalyst

D.

Surface area, catalyst, temperature, preciptate

27.

Which of the following is not a characteristic of bases?

A.

Turns litmus paper red

B.

Feels slippery to the touch

C.

Soap and bleach are examples

D.

Do not react with metals

28.

What is the pressure that resists osmosis?

A.

Hypotonic pressure

B.

Osmotic pressure

C.

Air pressure

D.

Water pressure

29.

What is the name of the scale used to measure the acidity of a solution?

A.

Metric scale

B.

Acid scale

C.

Hp scale

D.

PH scale

30.

Bonus #2If you have equal amounts of of HCl (hydrochloric acid) and NaOH (sodium hydroxide) with the same concentration and you mix them together, would the pH be 0-6 or 8-14 or 7? Explain your answer.

31.

What happens to a catalyst in a chemical reaction?

A.

It is used up.

B.

It bonds with one of the reactants.

C.

It is released as energy.

D.

It is unchanged by the reaction.

32.

What is the pH of the weakest acid?

A.

0

B.

14

C.

6

D.

7

E.

8

33.

If the reaction needs more energy than the reactants have, then the reaction will be